Pith Number

pith:F7QRLYHR

pith:2013:F7QRLYHRLWXXGM4UX2TW2SK44F

not attested not anchored not stored refs pending

Generalizations of the Los-Tarski Preservation Theorem

Abhisekh Sankaran, Bharat Adsul, Supratik Chakraborty

arxiv:1302.4350 v2 · 2013-02-18 · cs.LO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F7QRLYHRLWXXGM4UX2TW2SK44F}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:20:48.103198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fe115e0f15daf733394bea76d495ce14516a023aa60d171567b9441de5adc7f

Aliases

arxiv: 1302.4350 · arxiv_version: 1302.4350v2 · doi: 10.48550/arxiv.1302.4350 · pith_short_12: F7QRLYHRLWXX · pith_short_16: F7QRLYHRLWXXGM4U · pith_short_8: F7QRLYHR

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/F7QRLYHRLWXXGM4UX2TW2SK44F \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2fe115e0f15daf733394bea76d495ce14516a023aa60d171567b9441de5adc7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95bae277f85647708c5567016a64b819b543bc5714ee5380aa29c025d3685332",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2013-02-18T16:52:40Z",
    "title_canon_sha256": "5eef380295a5ce6f8c532d2d6721e4f5eee09838760c9e241575a4b690cd3818"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.4350",
    "kind": "arxiv",
    "version": 2
  }
}